“This untimed practice quiz simulates the ICC exam format, giving you full exposure to real-style questions while allowing unlimited time to navigate, learn, and build confidence without time pressure.”

2024 Residential Plans Examiner (R3) (Untimed)

60 Questions

2 Hours

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1. What is the minimum required guard height for a residential balcony?

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2. What is the maximum allowable span for a 2×12 Douglas Fir-Larch #2 joist at 19.2-inch spacing with a 10 psf dead load when supporting living areas?

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3. What is the maximum allowable pressure differential across the door of a mechanical room when return air is taken from it?

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4. When grounding or bonding equipment with nonconductive coatings such as paint or enamel, which of the following is required?

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5. When outlet boxes are designed to support ceiling-suspended (paddle) fans, they must be marked with the maximum weight when the maximum weight exceeds ______.

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6. Receptacles that provide power for water-pump motors or other loads directly related to the circulation and sanitation system shall be located at least ____ ft from the inside walls of pools, outdoor spas, and hot tubs.

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7. What is the minimum required depth for a stair landing?

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8. For permanently installed heating equipment with motors rated at not over 1/8 horsepower and provided with supplementary overcurrent protection, the disconnecting means is permitted to be located in any location if _____.

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9. What does a demand response signal indicate?

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10. What is the required minimum net clear opening width for an emergency escape and rescue opening?

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11. What is the maximum spacing for anchor bolts securing a sill plate to a foundation wall?

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12. What is the minimum required width for a shower stall?

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13. For a 3-2×10 header supporting a roof, ceiling, and one center-bearing floor in a 36-foot-wide building with a 50 psf ground snow load, what is the maximum allowable span?

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14. What is the allowable ampacity of a No. 2 AWG aluminum conductor with 60°C insulation?

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15. Refrigerant piping installed within how many inches of the underside of roof decks must be protected from damage by nails and fasteners?

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16. What is required when preparing pipe ends for hydronic piping systems?

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17. What is the minimum footing size (width × thickness in inches) required for a 1-story cast in-place concrete with crawl space structure with a 50 psf roof live load and 1,500 psf soil bearing capacity?

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18. Piping shall not be supported on which materials at any point within the trench?

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19. What test pressure is required when testing a system designed for 3 psig maximum operating pressure?

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20. What is the maximum allowable span for a 2×6, #3 grade Hem-fir ceiling joist spaced 16 inches apart, with a dead load of 10 psf and a live load of 20 psf?

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21. What is the maximum allowable span for wood structural panels with a span rating of 48/24, when used as subfloor sheathing?

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22. If the passageway or service space is more than 12 inches below adjoining grade, what must be done?

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23. What is required between exterior masonry veneer supported by wood and veneer supported by the foundation?

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24. What is the required minimum headlap for slate shingles on a roof with a slope of 6:12?

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25. An individual vent shall be permitted to vent two traps or trapped fixtures as a common vent, provided the fixtures are located on what floor level?

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26. At an ambient temperature of 26–30°C, what correction factor is applied to all conductor temperature ratings?

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27. What is the maximum allowable span for a 2×8, #1 grade Douglas-fir ceiling joist spaced 12 inches apart, with a dead load of 5 psf and a live load of 10 psf?

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28. For solid fuel or oil-fired appliances, how close may a door swing be to a vent terminal?

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29. What is the minimum required thickness for footings supporting masonry chimneys?

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30. A pressure relief valve must be set to open at not less than how much above the system pressure?

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31. What action must be taken if entry for an inspection is refused?

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32. What is the minimum height of a guardrail required for decks more than 30 inches above grade?

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33. What is the minimum required net area of ventilation opening for a crawl space?

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34. For a 6-inch waffle-grid basement wall with 9 feet of unsupported wall height, 7 feet of unbalanced backfill, and GP soil, what is the minimum required vertical reinforcement?

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35. What is the minimum required egress width between two handrails for a stairway?

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36. What is the minimum height of a guardrail required for stairways more than 30 inches above grade?

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37. In addition to being accessible, how must a sump be located relative to the drainage flow?

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38. What is the maximum allowable opening in a guardrail for residential stairs?

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39. What is the minimum thickness for a concrete slab-on-grade for habitable spaces?

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40. For loads consisting of not more than two two-wire branch circuits in other than dwelling units, the service conductors shall have an ampacity of not less than how many amperes?

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41. What is the minimum required height for a masonry chimney above a roof surface?

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42. Mineral-surfaced roll roofing must conform to which of the following standards?

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43. What identification is required for piping and fittings used in a mechanical system?

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44. What is the minimum number of coats of cement plaster required over metal lath in exterior plaster applications?

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45. What is the minimum free area required for each combustion air opening when combining spaces on the same story?

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46. What is the minimum number of braced wall panels required for a braced wall line 16 feet or shorter?

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47. Which of the following is NOT an approved standard for identifying and grading wood structural panels?

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48. What is the minimum required headroom for a stairway?

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49. What is the design loading factor (gallons per square foot per day) for a soil with a percolation rate of 10 to less than 30 minutes per inch?

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50. What is the maximum depth allowed fill material of gravel used under a foundation slab?

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51. What is the maximum allowable span for a 2×8 Hem-Fir #2 joist at 12-inch spacing with a 10 psf dead load when supporting living areas?

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52. What is the equivalent length for a 6-inch radius smooth 45-degree elbow used in a dryer exhaust duct?

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53. Where must a service disconnect be installed?

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54. When are cuts, notches, or holes allowed in engineered wood products such as trusses, glue-laminated members, or I-joists?

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55. A shower installation has a total flow rate of 6.5 gpm (24.6 L/m). What is the minimum required trap size (diameter)?

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56. Lavatories must have waste outlets not less than how many inches in diameter?

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57. Which of the following insulation types is not permitted for individual current-carrying conductors under the IRC?

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58. For a wall enclosing conditioned space to be classified as a basement wall, what minimum percentage must be below grade?

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59. Outdoor or return air for forced-air systems is prohibited from which of the following sources?

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60. If a fixture has an effective opening greater than 1 inch, the minimum air gap away from a wall must be at least:

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